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Finding the Fourth Proportional to 327.39, 490.78 and 144.74

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Solution

The fourth proportional to 327.39, 490.78 and 144.74 is: 216.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.39 : 490.78 = 144.74 : x
  2. Step 2: Convert to fraction form
    327.39/490.78 = 144.74/x
  3. Step 3: Cross multiply
    327.39x = 490.78 × 144.74
  4. Step 4: Simplify right side
    327.39x = 71,035.50
  5. Step 5: Solve for x
    x = 71,035.50/327.39
  6. Step 6: Final answer
    x = 216.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.